While in a two-way conversation, press FLASH, dial the third number, press FLASH again, and all three will be connected.
To answer an unattended phone within your group, lift handset and dial 113.
For university phones that are programmed to forward calls to another station: to set the call forwarding, pick up the handset to your phone to get dial tone. Dial the access code of 172 and then the number you wish to forward your line to using campus dial instructions for 5 digit dial, external calls and long distance. Do not hesitate in between numbers. You will need to let the other end answer otherwise the call forward won't go through. To deactivate this feature pick up the handset and dial 173.
This allows you to transfer a call to another person. Most times it will be an on campus number so you simply press flash, dial the number (5 digit dial if on campus), and flash again then you hang up. Some people don't like the blind transfer, so you can announce the call before sending it through. When you press flash for the 1st time, it puts the caller on hold. When you dial the extension to send the call to then it's just you and that person. At this time, you can talk to the other end, and let them know about the call. When you press flash the 2nd time, it makes a 3 way call between you, the caller, and who they want to transfer to. Once you hang up, then they are on the call together.